В этом упражнении нужно правильно использовать фразы "have to", "don't have to", "has to", "doesn't have to", чтобы выразить необходимость или отсутствие необходимости делать что-то. Вот как можно заполнить пропуски в предложениях:
- We have to go to school every day, but we don't have to go to school on Sunday.
- My brother and I don't have to make breakfast. Our mum makes it.
- Mum doesn't have to go shopping. Dad goes shopping twice a week.
- Dad doesn't have to wash our car at weekends.
- Mum doesn't have to drive to work. She walks.
- We have to wear a school uniform. It's dark blue.
Здесь использование "have to" и "has to" указывает на обязанность делать что-то, а "don't have to" и "doesn't have to" на отсутствие такой обязанности.